Tread portion of an automobile tire



FIG. 1 is a perspective view of a tread portion of an automobile tire;

FIG. 2 is a front view thereof;

FIG. 3 is a plane view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a rear view thereof;

FIG. 7 a fragmentary enlarged view showing the details of the tread portion thereof;

FIG. 8 is an end view taken along line 8-8 in FIG. 7;

FIG. 9 is an end view taken along line 9-9 in FIG. 7;

FIG. 10 is an end view taken along line 10-10 in FIG. 7; and,

FIG. 11 is an enlarge reference view showing the details of the tread portion thereof.

In the drawings, the broken lines defining the sidewall, inner bead and the peripheral boundary between the claimed tire tread and the unclaimed portions of tread depict environmental subject matter that forms no part of the claimed design. 

The ornamental design for a tread portion of an automobile tire, as shown and described. 